Guinness World Recors

Participants play in a swimming pool filled with pink and green plastic balls during a Guinness World Records attempt of the Largest Ball Pit as part of the "Pink October" campaign at Kerry Hotel in Pudong, Shanghai. The event, aimed at raising awareness of breast cancer prevention, set the world record with one million balls in the 25-metre-long (82 ft.) and 12.6-metre-wide (41 ft.) swimming pool, according to local media.

Aly Song/Reuters

Participants play in a swimming pool filled with pink and green plastic balls during a Guinness World Records attempt of the Largest Ball Pit as part of the Pink October campaign at Kerry Hotel in Pudong, Shanghai. The event, aimed at raising awareness of breast cancer prevention, set the world record with 1m balls in the 25-metre-long and 12.6-metre-wide swimming pool, according to local media.